CN102378213B

CN102378213B - A kind of method and system detecting relay node downlink control channel

Info

Publication number: CN102378213B
Application number: CN201010260808.5A
Authority: CN
Inventors: 袁明; 毕峰; 梁枫; 杨瑾; 吴栓栓; 袁弋非; 戴博
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2010-08-18
Filing date: 2010-08-18
Publication date: 2015-12-16
Anticipated expiration: 2030-08-18
Also published as: WO2012022195A1; CN102378213A

Abstract

The invention discloses a kind of method detecting relay node downlink control channel, comprising: the partition of available resources of relay node downlink control channel is subset by network side, and at least one in subset is distributed to via node; RN determines self R-PDCCH in distributed subset.The present invention discloses a kind of system detecting relay node downlink control channel, be applied in the communication network containing RN, comprise division unit, allocation units and determining unit, division unit and allocation units are arranged at network side, and determining unit is arranged at RN; Wherein, division unit, for being subset by the R-PDCCH partition of available resources of network side; Allocation units, for distributing to RN by least one in subset; Determining unit, for determining the R-PDCCH of RN in distributed subset.This invention ensures that the correct detection of via node to R-PDCCH, and reduce the complexity of blind Detecting down control channel to a certain extent, improve treatment effeciency.

Description

A kind of method and system detecting relay node downlink control channel

Technical field

The present invention relates to relay node downlink control channel (R-PDCCH, RelayPhysicalDownlinkControlChannel) determination technology, particularly relates to a kind of method and system determining the detection relay node downlink control channel of the R-PDCCH method of salary distribution and bearing mode.

Background technology

Long Term Evolution (LTE, LongTermEvolution) system, senior Long Term Evolution (LTE-A, LongTermEvolution-Advanced) system and IMT-Advanced system (IMT-A, InternationalMobileTelecommunication-Advanced) be all with OFDM (OFDM, OrthogonalFrequencyDivisionMultiplexing) technology based on communication system.In ofdm system, data are time-frequency bidimensional form, and 1 subframe (subframe) is made up of 2 time slots (slot), if adopt normal cyclic prefix (CP, CyclicPrefix), each slot is made up of 7 OFDM symbol; If adopt expansion CP, each slot to be made up of 6 OFDM symbol.Wherein, down control channel (PDCCH, PhysicalDownlinkControlChannel) is positioned in front 1 or 2 or 3 or 4 OFDM symbol.In LTE communication system, the information of PDCCH transmission is made up of downstream grants information (DLgrant) and uplink authorization information (ULgrant) two parts.

For convenience of description, in LTE communication system, define following term and agreement:

1, Resource Unit (RE, ResourceElement): minimum time/frequency source block, occupies 1 subcarrier in 1 OFDM symbol.

2, resource unit group (REG, ResourceElementGroup): according to the difference of reference symbol position in each OFDM symbol, 1 REG can be made up of 4 or 6 RE.

3, control information unit (CCE, ControlChannelElement): be made up of 36 RE, 9 REG, the information comprised in CCE has DLgrant and ULgrant of user.

4, Physical Resource Block (PRB, PhysicalResourceBlock): occupy continuous 1 time slot in time-domain, frequency domain occupies continuous 12 subcarriers.

5, Physical Resource Block is to (PRBpair): time-domain occupies continuous 1 subframe, frequency domain occupies continuous 12 subcarriers.

In LTE system, the mapping process of PDCCH is briefly described as follows:

At transmitting terminal, base station (eNB, EnhancedNodeB) mapping to PDCCH specifically comprises:

1st step, the PDCCH (comprising DLgrant and ULgrant) of users (UserEquipment, referred to as UE) all for its subordinate is carried out absolute coding, and namely the PDCCH of each UE can adopt different code rates.

2nd step, connects all PDCCH after coding, then carries out scrambling by cell-specific sequence, and obtain a string control information unit CCE.

3rd step, carries out QPSK modulation to above-mentioned a string CCE.

4th step, is that unit interweaves to above-mentioned symbol with REG, and is mapped in front 1 or 2 or 3 or 4 OFDM symbol according to the mode of frequency domain after first time domain.

At receiving terminal, UE utilizes cell-specific reference symbol (CRS, CellspecificReferenceSignals) to carry out demodulation to PDCCH, and carries out blind Detecting to CCE, finally obtains respective PDCCH.

Because future wireless system or cellular system require to increase coverage, support higher rate transmission, this proposes new challenge to wireless communication technology.Meanwhile, the cost issues of system building and maintenance is more outstanding.Along with the increase of transmission rate and communication distance, the energy consumption issues of battery also becomes outstanding, and the radio communication in future will adopt higher frequency, and the pathloss attenuation caused thus is more serious.In order to increase the coverage of high data rate, group mobility, casual network deployment, improve the throughput of cell edge, and provide service for the user in the covering leak of cellular system, relaying (Relay) technology is introduced in wireless communication system, therefore relaying technique is regarded as a key technology of forth generation (4G, 4thGeneration).

Fig. 1 is the system architecture schematic diagram comprising RN according to correlation technique, as shown in Figure 1, link in mobile communication system between eNB and via node (RN, RelayNode) is called repeated link (BackhaulLink), also referred to as back haul link; Link between user under RN and its coverage is called access link (AccessLink), and the link between the UE under eNB and its coverage is referred to as the link (DirectLink) that direct transfers.Concerning eNB, RN is just equivalent to a UE; Concerning UE, RN is just equivalent to eNB.

At present, when adopting relaying (inband-relay) mode in band, namely backhaullink and accesslink uses identical frequency band, and in order to avoid the transmitting-receiving of RN self is disturbed, RN can not carry out the operation sending and receive in same frequency resource simultaneously.When RN sends down control channel to its subordinate UE, do not receive the down control channel from eNB.Therefore, in descending backhaul (backhaul) subframe (namely eNB is to the subframe at RN transmission data place).Fig. 2 is the frame structure schematic diagram according to correlation technique, as shown in Figure 2, RN sends PDCCH first in front 1 or 2 OFDM symbol the UE of its subordinate, then within a period of time, carry out the switching from being transmitted into reception, after having switched, OFDM symbol below receives the data from eNB, comprising relay node downlink control channel (R-PDCCH, and via node Physical Downlink Shared Channel (R-PDSCH, RelayPhysicalDownlinkSharedChannel) RelayPhysicalDownlinkControlChannel).

ENB is carried on Physical Resource Block to upper to the R-PDCCH that RN sends, and comprises the information such as the uplink/downlink scheduling authorization of RN.Fig. 3 is according to R-PDCCH and the PDCCH position relationship schematic diagram in correlation technique, and as shown in Figure 3, in descending backhaul subframe, eNB semi-statically reserved some PRBpair is used for the transmission of R-PDCCH.Wherein, PDCCH before the 1st slot, n (n≤3) individual symbol transmits, and DLgrant remaining symbol transmits except PDCCH takies the 1st slot's, and ULgrant transmits on the 2nd slot.

It third generation partner program (3GPP, The3rdGenerationPartnershipProject) meeting is always the focus discussed about the intertexture problem of R-PDCCH.Wherein, when adopting CRS demodulation R-PDCCH, up to the present, only propose rough deinterleaving method: by semi-static reserved Physical Resource Block to being divided into some subsets (subset), and mutually do not cover between each subset, be mapped on certain subset after the R-PDCCH of a part of RN is interweaved.Such as, but not any concrete methods of realizing, how subset divides, and the collocation method etc. of subset does not all have corresponding scheme.At present, the technical scheme related to about how detecting R-PDCCH is not yet had in prior art.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method and system detecting relay node downlink control channel, can ensure that via node is to the correct detection of R-PDCCH and the complexity reducing detection down control channel.

For achieving the above object, technical scheme of the present invention is achieved in that

Detect a method for relay node downlink control channel, described method comprises:

The partition of available resources of R-PDCCH is subset (subset) by network side, and at least one in described subset is distributed to RN;

RN determines self R-PDCCH in distributed subset.

Preferably, at least one in described subset is distributed to RN to be specially:

Only a subset is distributed to RN, or by all subset allocation to RN.

Preferably, the partition of available resources of R-PDCCH is that subset is specially by network side:

The sum of the PRB for carrying R-PDCCH utilizing network side to reserve is to determine subset division mode;

Or, subset division mode corresponding under utilizing channel width to determine often kind of channel width.

Preferably, utilize the sum of PRB to determine that the dividing mode of subset is specially:

Each reserved PRB sum corresponds to a kind of subset division mode, or each reserved PRB sum corresponds to two or more subset division modes;

Under utilizing channel width to determine often kind of channel width, corresponding subset sum is specially:

Often kind of channel width corresponds to a kind of subset division mode, or often kind of channel width corresponds to two or more subset division modes.

Preferably, described method also comprises: described network side does not notify the subset belonging to RN;

RN determines that in distributed subset the R-PDCCH of self is specially: RN determines subset division mode according to the PRB sum of carrying R-PDCCH or channel width, carries out blind Detecting successively, until determine the R-PDCCH of self to determined subset; Or when can not determine out subset division mode, the subset corresponding to all subset division modes carries out blind Detecting respectively, until determine the R-PDCCH of self.

Preferably, described method also comprises: described network side implies the subset that notice RN carries R-PDCCH;

RN determines that in distributed subset the R-PDCCH of self is specially: RN carries out blind Detecting to the subset of implicit notice successively, until determine the R-PDCCH of self.

Preferably, described implicit notice refers to, the subset index number at the concrete place of R-PDCCH of RN, is uniquely determined or the combination in any of above-mentioned three parameters is determined jointly by the sum of RNID or subset or reserved PRB sum.

Preferably, when a subset is distributed to RN by network side, RN determines that in distributed subset the R-PDCCH of self is specially: RN detects self R-PDCCH in described subset.

Preferably, described method also comprises:

When RN initially accesses, RN carries the PRB index information of R-PDCCH to utilize PDCCH to notify;

Or RN carries the PRB index information of R-PDCCH to utilize high-level signaling to notify.

Preferably, described method also comprises:

The PRB index information of bearing downlink authorization message and/or uplink authorization information is informed to RN.

Preferably, the partition of available resources of R-PDCCH is subset by network side, and at least one in described subset is distributed to RN, is specially:

The sum of fixing or semi-static fixed subset and size, and the call number of the R-PDCCH subset of carrying RN;

RN determines that in distributed subset the R-PDCCH of self is specially:

RN determines the fixing of self R-PDCCH of carrying or semi-static fixed subset, and in determined subset, detect the R-PDCCH of self.

Preferably, described method also comprises:

The sum of fixing or semi-static fixing downstream grants information and/or uplink authorization information and size, and the PRB call number of bearing downlink authorization message and/or uplink authorization information.

A kind of system detecting relay node downlink control channel, be applied in the communication network containing RN, described system comprises division unit, allocation units and determining unit, and described division unit and described allocation units are arranged at network side, and described determining unit is arranged at RN; Wherein,

Division unit, for being subset by the R-PDCCH partition of available resources of network side;

Allocation units, for distributing to RN by least one in described subset;

Determining unit, for determining the R-PDCCH of RN in distributed subset.

Preferably, a subset further, is only distributed to RN by described allocation units, or by all subset allocation to RN.

Preferably, described division unit further, utilizes the sum of the PRB for carrying R-PDCCH of network reservation to determine subset division mode; Or, subset division mode corresponding under utilizing channel width to determine often kind of channel width; Wherein, each reserved PRB sum corresponds to a kind of subset division mode, or each reserved PRB sum corresponds to two or more subset division modes; Or often kind of channel width corresponds to a kind of subset division mode, or often kind of channel width corresponds to two or more subset division modes.

Preferably, described system also comprises: notification unit, is arranged at network side, for not notifying the subset belonging to this RN of RN;

Described determining unit determines subset division mode according to reserved PRB sum or channel width further, and carries out blind Detecting to determined subset successively, until determine the R-PDCCH of described RN; Or when can not determine out subset division mode, the subset corresponding to all subset division modes carries out blind Detecting respectively, until determine the R-PDCCH of self.

Preferably, described system also comprises: notification unit, is arranged at described network side, for the R-PDCCH subset of implicit notice RN carrying;

Described determining unit carries out blind Detecting to the subset of implicit notice successively, until determine the R-PDCCH of self.

Preferably, when a subset is distributed to RN by described allocation units further, described determining unit detects the R-PDCCH of described RN further in notified subset.

Preferably, described system also comprises:

PRB index information notification unit, for when RN initially accesses, RN carries the PRB index information of R-PDCCH to utilize PDCCH to notify; Or RN carries the PRB index information of R-PDCCH to utilize high-level signaling to notify.

Preferably, the described division unit sum of fixing or semi-static fixed subset and size further; Described allocation units are the fixing or semi-static fixing call number carrying the R-PDCCH subset of RN further;

Described determining unit determines the fixing of the R-PDCCH carrying described RN or semi-static fixed subset further, and in determined subset, detect the R-PDCCH of self.

In the present invention, according to current R-PDCCH can PRB determine to subset dividing mode, and then by divided subset allocation to RN, wherein, can by all subset allocation to RN, or by one of them subset allocation to RN, also can by a part of subset allocation wherein to RN.Now, can by explicit for the subset distributing to each RN or implicitly inform to RN, with the detection facilitating RN to carry out the R-PDCCH of self according to subset information.The present invention, just based on above-mentioned thought, realizes the fast detecting of RN to R-PDCCH when saving Internet resources as far as possible.The present invention can be applicable to comprise in the communication network of via node well, ensure that the correct detection of via node to R-PDCCH, and reduces the complexity of blind Detecting down control channel to a certain extent, improve the treatment effeciency of whole system.

Accompanying drawing explanation

Fig. 1 is the system architecture schematic diagram comprising RN according to correlation technique;

Fig. 2 is the frame structure schematic diagram according to correlation technique;

Fig. 3 is according to R-PDCCH and the PDCCH position relationship schematic diagram in correlation technique;

Fig. 4 is the composition structural representation that the present invention detects the system of relay node downlink control channel.

Embodiment

Basic thought of the present invention is, according to current R-PDCCH can PRB determine to subset dividing mode, and then by divided subset allocation to RN, wherein, can by all subset allocation to RN, or by one of them subset allocation to RN, also can by a part of subset allocation wherein to RN.Now, can by explicit for the subset distributing to each RN or implicitly inform to RN, with the detection facilitating RN to carry out the R-PDCCH of self according to subset information.

For making the object, technical solutions and advantages of the present invention clearly understand, by the following examples also with reference to accompanying drawing, the present invention is described in more detail.

Embodiment one

In this example, the reserved dividing mode for the N number of PRBs with subset that carry R-PDCCH is uniquely corresponding; Wherein, the number of subsets that can divide is set to m.Below describe it in detail.

The size that the semi-static reserved N number of PRBs being used for carrying R-PDCCH is divided into m subset, m value and this m subset is uniquely determined by N value by base station.Concrete determination mode is as shown in table 1, and wherein, the PRB comprised in each subset can be continuous print, also can be discrete, but its dividing mode is but unique, and concrete dividing mode is as shown in table 1.In table 1, the maximum number of subset is 5.Also as required, the situation more than 5 subset can be set.In table 1, when subset is multiple, the PRB distributed in each subset is impartial as far as possible.

Wherein, no matter N value is how many, all comprises a kind of possibility, namely only has the situation of 1 subset, as shown in table 1, and under various N value, m is 1, and namely the size of subset just equals semi-static reserved PRB number N.Suppose eNB semi-static be assigned with 10 PRB for R-PDCCH, so the size of subset is 10, as long as RN carries out blind Detecting in these 10 PRB, until blind check goes out the R-PDCCH of self.

In addition, also comprise the situation of multiple subset, such as, give tacit consent to and be divided into 3 subset, i.e. m=3 during N=8, the PRB number comprised in each subset is as shown in table 1.Table 1 has only been enumerated to N=20, and the situation being greater than 20 just no longer enumerates.In table 1, the maximum number of subset is 5.Also as required, the situation more than 5 subset can be set.In table 1, when subset is multiple, the PRB distributed in each subset is impartial as far as possible.Concrete, for reserved for carrying the situation that R-PDCCHPRBs sum N is greater than 20, divide according to aforesaid subset division principle.The present invention is once determine subset dividing mode as shown in table 1, namely be equivalent to according to the reserved concrete dividing mode directly defining subset for carrying R-PDCCHPRBs sum N, like this, RN according to the corresponding informance shown in table 1, can determine for carrying R-PDCCHPRBs sum the subset mode that network side marks off according to reserved.Such as, as N=18, m=3, has 6 PRB in 3 corresponding subset respectively.

Table 1

In this example, when RN is in initialization, table 1 is informed RN by base station, and such RN, after obtaining cicada N value, searches according to table 1, just obtains the configured in one piece situation of subset.Such as, if N=10, then RN is just known and is had 3 subset, and has in subset1 and subset2 in 3 PRB, subset3 and have 4 PRB.Like this, when network side fail to give notice subset that RN carries the R-PDCCH of this RN specifically which time, first RN can carry out blind check to subset1, if its corresponding R-PDCCH do not detected, then continue to carry out blind check to subset2, then do not continue to carry out blind check to subset3, until blind check goes out its corresponding R-PDCCH.

In addition, when subset sum is more, RN, when carrying out blind Detecting to subset, in order to reduce blind Detecting number of times, can limit needing the subset index (subsetindex) detected.Such as, as N=20, if do not limited, need to carry out blind Detecting respectively to 5 subset, blind check number of times is huger.If eNB and RN makes an appointment, the subset of the R-PDCCH of carrying RN is only be numbered odd number or is only the subset being numbered even number, or, the scope of the subset of the R-PDCCH of setting carrying RN, like this, RN only carries out blind Detecting to odd number subset or even number subset or at certain several specific subset, the R-PDCCH of self can be detected, so just greatly reduce blind Detecting number of times.

Embodiment two

In this example, the reserved dividing mode for the N number of PRBs with subset that carry R-PDCCH is uniquely corresponding; Wherein, the number of subsets that can divide is set to m.The determination mode of m value is identical with embodiment one.

In this example, base station is except informing the subset dividing mode that RN is all, and what also imply informs the subset index number (subsetindex) that each RN is affiliated separately.

First, the table 1 that RN notifies according to N value and network side knows all subset; Secondly, the subsetindex at the R-PDCCH place of carrying self is known according to the implication relation between parameter and via node mark (RN-ID) such as the sum of subset.As a kind of implementation, the subsetindex at the R-PDCCH place carrying RN can be determined in the following manner:

Subsetindex=RN-IDmodN _subset, wherein RN-ID is the casual network mark of RN, N _subsetfor the total N of subset.

In this case, RN without the need to phase embodiment one like that to m subset or specifically subset carry out blind Detecting respectively, as long as and carry out the blind check of R-PDCCH in subset corresponding to subsetindex belonging to self, greatly reduce blind check number of times.

Embodiment three

In this example, the reserved dividing mode for the N number of PRBs with subset that carry R-PDCCH is uniquely corresponding; Wherein, the number of subsets that can divide is set to m.Determined but not unique situation by N value for m value, concrete processing mode is as follows:

M value is defined as by base station { 1,2,3,4}, 4 kinds of different m values that namely same N value is corresponding.For making RN determine m value, network side need notify RN with 2 bits in R-PBCH.Such as, as N=15, indicate m value by following manner:

When the indication bit carried in R-PBCH is 00, represent m=1, namely only have 1 subset;

When the indication bit carried in R-PBCH is 01, represent m=2, be namely divided into 2 subset, in each subset, have 7 and 8 PRBpair respectively;

When the indication bit carried in R-PBCH is 10, represent m=3, be namely divided into 3 subset, each subset has 5 PRBpair;

When the indication bit carried in R-PBCH is 11, represent m=4, be namely divided into 4 subset, each subset comprises 4,4,4 and 3 PRBpair respectively.

If it is 10 that RN receives the indication bit carried in R-PBCH, then RN has just known all subset, and namely subset adds up to 3, and each subset has 5 PRBpair.And then RN carries out blind Detecting, until detect the R-PDCCH of self respectively to these 3 subset.

In addition, if in this example, do not utilize R-PBCH to notify the dividing mode of subset to RN, so, first RN carries out blind check to m=1, is now defaulted as and only has 1 subset, as long as the R-PDCCH of RN blind Detecting self in this subset.If do not detect the R-PDCCH of self, more respectively blind check is carried out to 2 subset corresponding under m=2, first detect subset1, do not detect subset2 again.If still do not detect the R-PDCCH of self, then carry out blind check respectively to 3 subset corresponding under m=3, the rest may be inferred, until blind check goes out its corresponding R-PDCCH.

Embodiment four

Wherein the determination of m value is identical with previous embodiment three.Such as, as N=18, if R-PBCH instruction 11, then represent m=4, all subset are: 4 subset, each subset comprise 4,4,4 and 6 PRBpair respectively; If R-PBCH instruction 10, then m=3, all subset are: 3 subset, each subset comprise 6 PRBpair respectively.

In this example, base station is except informing the dividing mode of RNsubset by R-PBCH, what also imply informs the subset index number (subsetindex) that each RN is affiliated separately.As a kind of implementation, the subsetindex at the R-PDCCH place carrying RN can be determined in the following manner:

Supposing that RN receives the indication bit carried in R-PBCH is 11, then RN has just known above-mentioned all subset, and namely subset adds up to 4, and each subset comprises 4,4,4 and 6 PRBpair respectively.And then the subsetindex at self place is calculated according to subsetindex=RN-IDmod4.Finally, in this subsetindex, carry out blind check R-PDCCH, now without the need to carrying out blind check to remaining subset.

Embodiment five

In this example, the reserved dividing mode for the N number of PRBs with subset that carry R-PDCCH is uniquely corresponding; Wherein, the number of subsets that can divide is set to m.

In this example, the total m value of subset and the size of this m subset are by channel width (BW _channel, ChannelBandwidth) and value uniquely determines.Concrete, as shown in table 2, under listing different channels bandwidth respectively, the dividing condition of corresponding subset.Such as, BW is worked as _channelduring=1.25MHz, under this bandwidth, always have 6 PRB.M=1 correspondence only has 1 subset, and its size is 3 PRB; M=2 comprises 2 PRB to 2 subset, subset1 should be had to comprise 1 PRB, subset2.Work as BW _channelduring=10MHz, correspondence always has the sum of 50 RB, subset can 1,2 and 3, and concrete dividing mode is as shown in table 2.Wherein, the size of m value and this m subset also can have other value.

Although m has several different value under the often kind of channel width enumerated in table 2, now unique value can only be got.

RN is when initialization, and base station is by the information notification RN in table 2.

Under each system bandwidth, m value is unique, and when namely only having a m value in table 2 under often kind of bandwidth, RN, after learning system bandwidth, by look-up table 2, can determine all subset.Such as, BW _channelduring=20MHz, m value is 4, and so RN is just known and had 4 subset, subset1, comprises 4,5,6 and 7 PRB in 2,3 and 4 respectively.So first RN carries out blind check to subset1, if its corresponding R-PDCCH do not detected, then continue to carry out blind check to subset2, then do not continue to carry out blind check to subset3, until its corresponding R-PDCCH is measured in blind check.

Table 2

Embodiment six

In this example, the determination of m value is identical with same embodiment five.Wherein, RN determines that in distributed subset the mode of the R-PDCCH of self is identical with the determination mode of embodiment two or embodiment four.Here repeat no more.

Embodiment seven

In this example, subset division mode is by BW _channelvalue is determined but dividing mode is not unique.

RN is after learning channel width, and look-up table 2, because m value under each channel width is not unique, therefore obtains the division of multiple subset corresponding under multiple m value.For making RN determine current subset dividing mode, now by notifying with 2 bits the subset dividing mode that RN is current in R-PBCH.Such as, BW is worked as _channelduring=5MHz,

When the indication bit carried in R-PBCH is 01, represent m=2, be namely divided into 2 subset, in each subset, have 3 and 4 PRB respectively;

The indication bit carried in R-PBCH is 10 represent m=3, is namely divided into 3 subset, has 2,3 and 3 PRB in each subset respectively.

Supposing that RN receives the indication bit carried in R-PBCH is 10, then RN can know current divided all subset, and namely subset adds up to 3, has 2,3 and 3 PRB in each subset respectively.And then RN carries out blind Detecting, until detect the R-PDCCH of self respectively to these 3 subset.

In addition, if carry out dividing mode notice without R-PBCH to RN, first RN carries out blind check to m=1, now only has 1 subset, as long as the R-PDCCH of RN blind Detecting self in this subset.If do not detect its corresponding R-PDCCH, more respectively blind check is carried out to 2 subset corresponding under m=2, first detect subset1, not at detection subset2.If still detect its corresponding R-PDCCH, finally respectively blind check is carried out, until blind check goes out its corresponding R-PDCCH to 3 subset corresponding under m=3.

Embodiment eight

The present invention, can when RN initially accesses, by PDCCH, network side notifies that RN carries the PRBindex information of its R-PDCCH.Like this, RN directly knows the concrete PRBindex that the subset at its R-PDCCH place comprises on PDCCH, such RN without the need to knowing out of Memory, directly blind check R-PDCCH in above-mentioned PRBindex.In this case, RN, without the need to knowing all subset, that is, is now concrete PRBindex concerning what obtain RN, does not have the concept of subset.

Embodiment nine

In the non-initial access moment of RN, in the i.e. proper communication moment, in a certain subframe, eNB utilizes special high-level signaling, the clear and definite new PRBindex informing its R-PDCCH place, the initial p RBindex that now so-called new PRBindex and network side in embodiment eight are informed compares, and changes to some extent.Namely next subframe has been arrived, the R-PDCCH of RN just blind check self in above-mentioned new PRBindex.With embodiment Aug. 1st sample, be now concrete PRBindex concerning what obtain RN, there is no the concept of subset.

Embodiment ten

The sum of subset is fixed as 3 by supposing the system, 4 PRB comprised in each subset, and which 4 PRBindex fixes is simultaneously.In addition, also need to fix RN1 and be positioned at subset1, RN2 is positioned at subset2 and RN3 and is positioned at subset3.All these information, all want mutually to appoint between eNB and RN in advance.When eNB with RN communicates, RN1 can directly in subset1, its R-PDCCH, RN2 of blind check then can directly in subset2, its R-PDCCH, RN3 of blind check can direct its R-PDCCH of blind check in subset3.

This mode be completely fixed, compares and is applicable to the less situation of RN.

Embodiment 11

This example for be the Notification Method of DLgrant and ULgrant bearing mode.

DLgrant and ULgrant has its respective PRBindex respectively.

By PDCCH, network side notifies that RN carries the PRBindex information of DLgrant and ULgrant.When RN initially accesses, PDCCH can be received, therefore RN directly knows the PRBindex at itself DLgrant and ULgrant place separately on PDCCH, such RN is without the need to knowing out of Memory, the directly DLgrant of blind check self in the PRBindex at above-mentioned DLgrant place, the ULgrant of blind check self in the PRBindex at above-mentioned ULgrant place.In this case, RN, without the need to knowing the configured in one piece situation of subset, that is, is now concrete PRBindex concerning what obtain RN, does not have the concept of subset.

In the non-initial access moment of RN, the i.e. proper communication moment, in a certain subframe, eNB utilizes special high-level signaling, the clear and definite new PRBindex informing itself DLgrant and ULgrant place separately, the initial p RBindex that now so-called new PRBindex and embodiment eight are informed compares, and changes to some extent.Arrive next subframe, the DLgrant of RN just blind check self in the new PRBindex at above-mentioned DLgrant place, the ULgrant of blind check self in the new PRBindex at above-mentioned ULgrant place.Be now concrete PRBindex concerning what obtain RN, there is no the concept of subset.

The sum of the subset of DLgrant is fixed as 4 by supposing the system, 3 PRB comprised in each subset, and which 3 PRBindex fixes is simultaneously; The sum of the subset of ULgrant is fixed as 2,2 PRB comprised in each subset, which 2 PRBindex fixes is simultaneously.In addition, also need to fix: the DLgrant of RN1, RN2 and RN5 is positioned at subset1, and ULgrant is positioned at subset1; The DLgrant of RN3, RN4 is positioned at subset2, and ULgrant is positioned at subset2; RN6, RN7, and the DLgrant of RN8 is positioned at subset3, ULgrant is positioned at subset2.All these information, all want mutually to appoint between eNB and RN in advance.

When eNB with RN communicates, RN1, RN2 and RN5, when blind check DLgrant, can directly detect in DLgrantsubset1; During blind check ULgrant, can directly detect in ULgrantsubset1.

RN3, RN4, when blind check DLgrant, can directly detect in DLgrantsubset2; During blind check ULgrant, can directly detect in ULgrantsubset2.

RN6, RN7, and RN8 is when blind check DLgrant, can directly detect in DLgrantsubset3; During blind check ULgrant, can directly detect in ULgrantsubset2.

Fig. 4 is the composition structural representation that the present invention detects the system of relay node downlink control channel, as shown in Figure 4, the present invention detects the system divides unit 40 of relay node downlink control channel, allocation units 41 and determining unit 42, division unit 40 and allocation units 41 are arranged at network side, and determining unit 42 is arranged at RN; Wherein,

Division unit 40, for being subset by the R-PDCCH partition of available resources of network side;

Allocation units 41, for distributing to RN by least one in described subset;

Determining unit 42, for determining the R-PDCCH of RN in distributed subset.

A subset further, is only distributed to RN by above-mentioned allocation units 41, or by all subset allocation to RN.

Above-mentioned division unit 40 further, utilizes the sum of the PRB for carrying R-PDCCH of network reservation to determine subset division mode; Or, subset division mode corresponding under utilizing channel width to determine often kind of channel width;

Wherein, each reserved PRB sum corresponds to a kind of subset division mode, or each reserved PRB sum corresponds to two or more subset division modes; Or often kind of channel width corresponds to a kind of subset division mode, or often kind of channel width corresponds to two or more subset division modes.

On the basis of system detecting relay node downlink control channel shown in Fig. 4, present system also comprises: notification unit (not shown), is arranged at network side, for not notifying the subset belonging to this RN of RN;

Above-mentioned determining unit 42 determines subset division mode according to reserved PRB sum or channel width further, and carries out blind Detecting to determined subset successively, until determine the R-PDCCH of described RN; Or when can not determine out subset division mode, the subset corresponding to all subset division modes carries out blind Detecting respectively, until determine the R-PDCCH of self.

Or on the basis of system detecting relay node downlink control channel shown in Fig. 4, present system also comprises: notification unit (not shown), is arranged at described network side, for notifying the R-PDCCH subset range that RN carries;

Described determining unit carries out blind Detecting to the subset in notified subset range successively, until determine the R-PDCCH of self.

Or on the basis of system detecting relay node downlink control channel shown in Fig. 4, present system also comprises: notification unit, is arranged at described network side, for the R-PDCCH subset of implicit notice RN carrying;

Above-mentioned determining unit 42 carries out blind Detecting to the subset of implicit notice successively, until determine the R-PDCCH of self.Wherein, described implicit notice refers to, the subset index number at the concrete place of R-PDCCH of RN, is uniquely determined or the combination in any of above-mentioned three parameters is determined jointly by the sum of RNID or subset or reserved PRB sum.

When a subset is distributed to RN by above-mentioned allocation units 41 further, above-mentioned determining unit 42 detects the R-PDCCH of described RN further in notified subset.

On the basis of system detecting relay node downlink control channel shown in Fig. 4, present system also comprises:

Above-mentioned division unit 40 is the sum of fixing or semi-static fixed subset and size further; Above-mentioned allocation units 41 are the fixing or semi-static fixing call number carrying the R-PDCCH subset of RN further;

Above-mentioned determining unit 42 determines the fixing of the R-PDCCH carrying described RN or semi-static fixed subset further, and in determined subset, detect the R-PDCCH of self.

Those skilled in the art are to be understood that, the system of the detection relay node downlink control channel shown in Fig. 4 of the present invention is method for realizing aforesaid detection relay node downlink control channel and designs, and the practical function of above-mentioned each processing unit can refer to the associated description of preceding method and understands.The function of each processing unit in figure realizes by the program run on processor, also realizes by concrete logical circuit.

The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.

Claims

1. detect a method for relay node downlink control channel, it is characterized in that, described method comprises:

The partition of available resources of relay node downlink control channel (R-PDCCH) is subset (subset) by network side, and at least one in described subset is distributed to via node (RN);

RN determines self R-PDCCH in distributed subset;

Wherein, the quantity of described subset is uniquely determined by available resources, or network side notifies the quantity of subset described in RN by via node Physical Broadcast Channel (R-PBCH);

Described method also comprises: described network side implies the subset that notice RN carries R-PDCCH, wherein, described implicit notice refers to, the subset index number at the concrete place of R-PDCCH of RN, is uniquely determined by the sum of RNID or subset or reserved Physical Resource Block PRB sum or the combination in any of above-mentioned three parameters is determined jointly; RN determines that in distributed subset the R-PDCCH of self is specially: RN carries out blind Detecting to the subset of implicit notice successively, until determine the R-PDCCH of self.

2. method according to claim 1, is characterized in that, at least one in described subset is distributed to RN and is specially:

Only a subset is distributed to RN, or by all subset allocation to RN.

3. method according to claim 1, is characterized in that, the partition of available resources of R-PDCCH is that subset is specially by network side:

The sum of the Physical Resource Block (PRB) for carrying R-PDCCH utilizing network side to reserve is to determine subset division mode;

4. method according to claim 3, is characterized in that, utilizes the sum of PRB to determine that the dividing mode of subset is specially:

Under utilizing channel width to determine often kind of channel width, corresponding subset division mode is specially:

5. method according to claim 4, is characterized in that,

6. method according to claim 1, is characterized in that, when a subset is distributed to RN by network side, RN determines that in distributed subset the R-PDCCH of self is specially: RN detects self R-PDCCH in described subset.

7. the method according to any one of claim 1 to 6, is characterized in that, described method also comprises:

When RN initially accesses, RN carries the PRB index information of R-PDCCH to utilize down control channel (PDCCH) to notify;

8. method according to claim 7, is characterized in that, described method also comprises:

9. method according to claim 1, is characterized in that, described method also comprises:

10. one kind is detected the system of relay node downlink control channel, be applied in the communication network containing RN, it is characterized in that, described system comprises division unit, allocation units and determining unit, described division unit and described allocation units are arranged at network side, and described determining unit is arranged at RN; Wherein,

Allocation units, for distributing to RN by least one in described subset;

Determining unit, for determining the R-PDCCH of RN in distributed subset;

Described system also comprises: notification unit, is arranged at described network side, carries the subset of R-PDCCH for implicit notice RN; Wherein, described implicit notice refers to, the subset index number at the concrete place of R-PDCCH of RN, is uniquely determined or the combination in any of above-mentioned three parameters is determined jointly by the sum of RNID or subset or reserved Physical Resource Block PRB sum; Described determining unit carries out blind Detecting to the subset of implicit notice successively, until determine the R-PDCCH of self.

11. systems according to claim 10, is characterized in that, a subset further, is only distributed to RN by described allocation units, or by all subset allocation to RN.

12. systems according to claim 10, is characterized in that, described division unit further, utilizes the sum of the PRB for carrying R-PDCCH of network reservation to determine subset division mode; Or, subset division mode corresponding under utilizing channel width to determine often kind of channel width; Wherein, each reserved PRB sum corresponds to a kind of subset division mode, or each reserved PRB sum corresponds to two or more subset division modes; Or often kind of channel width corresponds to a kind of subset division mode, or often kind of channel width corresponds to two or more subset division modes.

13. systems according to claim 12, is characterized in that

14. systems according to claim 10, is characterized in that, when a subset is distributed to RN by described allocation units further, described determining unit detects the R-PDCCH of described RN further in notified subset.

15., according to claim 10 to the system according to any one of 14, is characterized in that, described system also comprises: